THALLIUM. CROOKES. 129 



The only result requiring one word of explanation is that 

 of No. 3, where my calculation gave 2.45 in the last place 

 (the fifth). I have properly put this as 3, since the second 

 5 raises the first 4 to 5 under rule. The record of Crookes, 

 as given by Clarke, gives 2.6, which rounds off to 3, exactly 

 as ours. 



Now, how do these, our own calculated analytical ratios 

 compare to those given by Clarke (and therefore by 

 Crookes), pretendedly based upon the weighing to the 

 in in ion th of the grain? 



They are absolutely identical with the analytical ratios 

 used by us and taken from Crookes by Clarke. 



Hence, firstly, all we have said as to the actual value of 

 these ratios and the corresponding true ivcighings of Crookes 

 to the thousandth of a grain remains. 



The tme atomic weight of nitrogen is 14 and not the 

 Stasio-Crookes' value of 14.04; all Stas' values are false, 

 according to the expurgated Crookes. 



They are absolutely identical these analytical ratios of 

 ours with those of Clarke-Crookes; 



Hence, secondly, this constitutes a most absolute demon- 

 stration of my declaration, above given, that 



the three last decimals in the weights given by Mr. 

 William Crookes are pure imagination, absolute 

 invention; that these weighings were never made, 

 never had any existence as experimental facts, nor 

 ever were actually used by Crookes, for they did not 

 enter his resulting analytical ratios at all. 



How did Mr. William Crookes get the false weights he 

 submitted as experimental data to the Royal Society in 



Of course, not by the use of actual weights, but by cal- 

 culating the weight by the oscillation method. 



Now, as we have had to show repeatedly, in all such cases 

 of calculation it is supposed that the calculator knows enough 

 about ivhat he is doing to stop when he has reached the limit of 

 precision^ and not to go on calculating till he gets tired. 



Mr. William Crookes, in 1873, was very much younger 

 than now, and while lacking the necessary scientific know!- 



